具有埋入基础的土-结构系统的非线性地震响应分析

被引:10
作者
扶长生
土岐憲三
机构
[1] 南京建筑工程学院
[2] 日本京都大学防灾研究所 教授
关键词
节理单元; 界面单元; 单元的; 结构物; 线性分析; 分析方法; 结构系统; 地基土; 埋入; 反应谱; 非线性地震响应; 响应分析; 中等地震;
D O I
10.13197/j.eeev.1987.01.005
中图分类号
学科分类号
摘要
本文使用7S-Ⅱ计算机程序,在两个不同大小的地震力作用下,对具有埋入基础的土-结构系统进行了地震响应分析。分析中不但考虑了地基土的材料非线性,而且考虑了接触界面的非线性。为了估计这些非线性性能对结构和土的响应值影响的大小,文中定义了非线性时间比,βJ和βJ。接触界面的动力性能在文中也得到了详细的讨论。在中等地震的作用下,界面上的滑移和剥离对其邻近区域的响应值就有了很大的影响。随着激震力的增大,结构物基础的侧面和地基土会完全剥离,使得系统的基频发生漂移,从而引起结构物顶端的线性和非线性结构内部反应谱之间在共振频率区段内有明显的差别。
引用
收藏
页码:43 / 54
页数:12
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